[PATCH v3 1/2] PCI: dwc: Implement general suspend/resume functionality for L2/L3 transitions

[Frank Li]

On Fri, May 12, 2023 at 02:47:46PM +0000, Frank Li wrote:
> > 
> > Introduced helper function dw_pcie_get_ltssm to retrieve
> > SMLH_LTSS_STATE.
> > Added API pme_turn_off and exit_from_l2 for managing L2/L3 state
> > transitions.
> > 
> > Typical L2 entry workflow:
> > 
> > 1. Transmit PME turn off signal to PCI devices.
> > 2. Await link entering L2_IDLE state.
> > 3. Transition Root complex to D3 state.
> > 
> > Typical L2 exit workflow:
> > 
> > 1. Transition Root complex to D0 state.
> > 2. Issue exit from L2 command.
> > 3. Reinitialize PCI host.
> > 4. Wait for link to become active.
> > 
> > Signed-off-by: Frank Li <Frank.Li at nxp.com>
> > ---
> 
> Ping

Ping

> 
> > Change from v2 to v3:
> > - Basic rewrite whole patch according rob herry suggestion.
> >   put common function into dwc, so more soc can share the same logic.
> > 
>